Position of Fancybox thumbnails relative to the current image

I am using fancybox 2.0.6 and am trying to figure out a way to keep the thumbnail bar either relative to the current image - it should be more visible than the bottom of larger browser windows.

I used jquery.fancybox-thumbs.css

to tweak bottom: 120px

, which helps, but if the browser window is smaller the thumbs obstruct the current image.

The only jquery options I've seen are "top" or "bottom".

Any thoughts on keeping it relative to the image without changing it on windows of different sizes?